*http://ja.wikipedia.org/wiki/SQL
*[ISO/IEC 9075-1:2003|http://www.iso.ch/iso/en/CatalogueDetailPage.CatalogueDetail?CSNUMBER=34132]
*[SQL:2003 Has Been Published|http://www.sigmod.org/sigmod/record/issues/0403/E.JimAndrew-standard.pdf]

!PostgreSQL
*[PostgreSQL 8.0.3 文書: 付録 D. SQL への準拠|http://www.postgresql.jp/document/pg803doc/html/features.html]